EP 0128457 A3 19870722 - CODING METHOD FOR AN ELECTRONIC KEY
Title (en)
CODING METHOD FOR AN ELECTRONIC KEY
Publication
Application
Priority
DE 3320721 A 19830608
Abstract (en)
[origin: EP0128457A2] In a coding method for an electronic key, a number of code numbers 1 to n are stored in the transmitter (1) and in the receiver (2) and a new corresponding code number is set automatically in the transmitter (1) and receiver (2) after every transmission and reception operation. The code emitted by the transmitter (1) contains information for the receiver (2) as to which code number is to be selected next from the stock. <IMAGE>
IPC 1-7
IPC 8 full level
E05B 49/00 (2006.01); E05B 65/20 (2006.01); G07C 9/00 (2006.01)
CPC (source: EP)
G07C 9/00182 (2013.01); G07C 9/21 (2020.01); G07C 2009/00253 (2013.01); G07C 2009/00785 (2013.01)
Citation (search report)
- [A] GB 1595797 A 19810819 - PUSHMAN HUGH JOHN [GB]
- [AP] EP 0106273 B1 19870513
Designated contracting state (EPC)
DE FR GB IT SE
DOCDB simple family (publication)
EP 0128457 A2 19841219; EP 0128457 A3 19870722; DE 3320721 A1 19841213; JP S6010081 A 19850119
DOCDB simple family (application)
EP 84106142 A 19840529; DE 3320721 A 19830608; JP 11632884 A 19840606